dear ubuntu community, the OS of my PC (supports 64 bits instruction) is ubuntu 12.04 32 bits desktop before, and i have just recently reinstalled it to ubuntu 12.04 64 bits desktop. before the re-installation, I created new partitions for /boot and /home and copy the /boot and /home folders in the 32 bits desktop OS (in the previous 32 bit desktop OS, the /, /boot, /home etc folders are all under the same partition, i.e. under the / partition) across to the /boot and /home partitions. so in the new 64 bits desktop OS, the /boot and /home are in its own partition, but keep the /boot config files and /home data & applications in the previous 32 bits desktop OS. moreover, resizing the /swap from 8GB to 15GB. doing these is for the convenience to upgrade to the new version of OS in the future and to make the new system to run more efficiently. the partitions creating, copying data/files and applications across over are fine (these were done with a LiveCD session), except of "Partition table entries are not in disk order" after creating new partitions, resizing /swap size and moving some unallocated space around, but this won't have impact to the new system operation. the reboot to the new OS is fine as well, but in the new 64 bits desktop OS after reinstall the previous applications, particularly the wine application (for Windows), and then reboot the PC, select "Ubuntu with Linux 3.2.0-32-generic-pae" from the boot loader, the system hangs forever. if select the "Ubuntu with Linux 3.2.0-32-generic-pae (recovery)" from the boot loader, got below "kernel panic" error: ...... request_module: runaway loop modprobe binfmt-464c kernel panic - not syncing: attempted to kill init ! Pid: 1, comm: run-init Not tainted 3.2.0-32-generic-pae #51-Ubuntu Call Trace: ...... the options from the boot loader are as below: Ubuntu with Linux 3.2.0-32-generic-pae Ubuntu with Linux 3.2.0-32-generic-pae (recovery) Previous Linux versions - Ubuntu with Linux 3.2.0-32-generic - Ubuntu with Linux 3.2.0-32-generic (recovery) however, if boot from the "Ubuntu with Linux 3.2.0-32-generic" under the "Previous Linux versions", it is fine, i.e. can login into the new 64 bits desktop OS and see all the data/files and applications as those in the previous 32 bits desktop OS. why got "hang" problem or "kernel panic" error when boot from the "Ubuntu with Linux 3.2.0-32-generic-pae" or "Ubuntu with Linux 3.2.0-32-generic-pae (recovery)" option? it is very much appreciated if anyone can help with this? thanks, david su